Percolation filtering system

Abstract

A percolation filtering system comprises a flow path of the water to be filtered including a filter cartridge seat ( 4 ) for removably receiving a filter cartridge ( 5 ) so that said flow path extends through said filter cartridge when said filter cartridge is inserted into said seat, characterized in that it comprises recognition means and counter-means of the suitability of said cartridge, respectively on said cartridge and said seat, suitable for reciprocal interaction when the cartridge is inserted in the seat to enable operation of the filtering system following the cartridge's suitability recognition, or to disable it or signal the suitability/unsuitability respectively of the cartridge if the cartridge is recognized/ not recognized respectively by the recognition means.

The invention claimed is: 
     
       1. A percolation filtering system comprising a flow path of water to be filtered including a filter cartridge seat for removably receiving a filter cartridge so that said flow path extends through said filter cartridge when said filter cartridge is inserted into said seat, wherein said system comprises
 a recognition device of the suitability of said cartridge provided on said cartridge and 
 a recognition device of the suitability of said cartridge provided on said seat, suitable for reciprocal interaction when the cartridge is inserted in the seat to enable operation of the filtering system following the cartridge's suitability recognition, or to disable it or signal the suitability/unsuitability respectively of the cartridge if the cartridge is recognised/not recognised respectively by the recognition device of the suitability of said cartridge provided on said cartridge; 
 wherein said recognition device of the suitability of said cartridge provided on said cartridge and said recognition device of the suitability of said cartridge provided on said seat are connected to a control of the system to activate one or more of the following controls:
 disabling the filling of a water basin of said flow path upstream of said cartridge, 
 disabling the water passage along the flow path from upstream of the cartridge to downstream of the cartridge seat, 
 disabling pouring of water from a basin of said flow path downstream of said cartridge, and 
 generation of an alarm signal; 
 
 wherein the recognition device of the suitability of said cartridge provided on said cartridge and the recognition device of the suitability of said cartridge provided on said seat respectively comprise a sealer associated with a shutter of a valve and an abutment—surface for the sealer, respectively on one and the other of seat and cartridge. 
 
     
     
       2. The filtering system according to  claim 1 , wherein: the shutter is urged into a closed position and abuts the valve seat when no recognized cartridge is in the seat, wherein the valve seat is the sole opening of the seat for the cartridge when the cartridge is housed and said seat. 
     
     
       3. The filtering system according to  claim 1 , wherein the sealer comprises an appendage of the shutter and the abutment—surface is arranged on the cartridge in a position such as to interact with the feeler for opening the shutter when a recognized cartridge is inserted in the seat. 
     
     
       4. The filtering system according to  claim 1 , wherein the recognition device of the suitability of said cartridge provided on said cartridge and the recognition device of the suitability of said cartridge provided on said seat, are of geometric recognition type. 
     
     
       5. The filtering system according to  claim 1 , wherein said control for disabling water passage along the flow path from upstream of the cartridge to downstream of the cartridge seat comprises the valve to intercept the flow path between said seat and a water basin downstream of said cartridge, to selectively intercept said passage in the absence of recognition of the cartridge when it is inserted in the seat.